Divisivibility rules Flashcards
by 2
If the last digit is even, the number is divisible by 2
by 2
If the last digit is even, the number is divisible by 2
by 3
If the sum of the digits is divisible by 3, the number is also.
by 3
If the sum of the digits is divisible by 3, the number is also.
by 4
If the last two digits form a number divisible by 4, the number is also.
by 4
If the last two digits form a number divisible by 4, the number is also.
by 5
If the last digit is a 5 or a 0, the number is divisible by 5.
by 5
If the last digit is a 5 or a 0, the number is divisible by 5.
by 6
If the number is divisible by both 3 and 2, it is also divisible by 6.
by 6
If the number is divisible by both 3 and 2, it is also divisible by 6.
by 8
If the last three digits form a number divisible by 8,then so is the whole number.
by 8
If the last three digits form a number divisible by 8,then so is the whole number.
by 9
If the sum of the digits is divisible by 9, the number is also.
by 9
If the sum of the digits is divisible by 9, the number is also.
by 10
If the number ends in 0, it is divisible by 10.
by 10
If the number ends in 0, it is divisible by 10.
by 12
If the number is divisible by both 3 and 4, it is also divisible by 12.
by 12
If the number is divisible by both 3 and 4, it is also divisible by 12.
by 7 or 11
While not applicable for all numbers, a number is divisible by 7 if it can be separated into groups of adjacent digits that are multiples of 7. For instance, 14,287 is divisible by 7 since 14, 28, and 7 are all multiples of 7. This idea works for any divisor, not just 7. You can see that 2,255 is divisible by 11.
by 7 or 11
While not applicable for all numbers, a number is divisible by 7 if it can be separated into groups of adjacent digits that are multiples of 7. For instance, 14,287 is divisible by 7 since 14, 28, and 7 are all multiples of 7. This idea works for any divisor, not just 7. You can see that 2,255 is divisible by 11.
